A factory recycles oil to make biofuel. It takes 20 litres of used oil to make 17 litres of biofuel.
The used oil is 10p per litre and the biofuel can be sold for 40p per litre.
How much used oil will be required to make a PROFIT of £300 each day in the factory?

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered